Tennessee sits squarely in USDA Zone 7, which means last frost dates ranging from mid-March in Memphis to mid-April in the Appalachian foothills. That gap matters: a West Tennessee gardener gains nearly four extra weeks of spring planting time compared to a grower in the northeast corner of the state. The practical upshot is that cool-season crops must be timed carefully β started early enough to mature before June heat collapses harvests, yet not so early that hard freezes kill tender seedlings.
The real advantage Tennessee offers is two legitimate cool seasons. Spring runs roughly February through May; fall runs late August through November and is often milder, longer, and less prone to bolt-triggering heat spikes than spring. Many experienced Tennessee growers consider fall their primary cool-season garden, sowing a second succession of nearly every crop on this list starting in August when daytime highs begin dropping below 90Β°F.
Summer humidity is the hidden constraint. It accelerates fungal pressure on brassicas and causes lettuce and spinach to bolt faster than they would in drier climates at the same temperature. Choosing disease-resistant varieties, providing afternoon shade during late spring, and spacing plants for airflow are not optional refinements here β they're the difference between a productive season and a crop failure.
At a glance
| Crop | Type | Days to harvest | Sun | Heat | Frost | Level |
|---|---|---|---|---|---|---|
| Pea | Cool | 55β70 days | Full | β | β | Easy |
| Broccoli | Cool | 60β90 days | Full | β | β | Moderate |
| Cabbage | Cool | 60β100 days | Full | β | β | Moderate |
| Cauliflower | Cool | 60β100 days | Full | β | β | Hard |
| Kale | Cool | 50β65 days | Full | β | β | Easy |
| Lettuce | Cool | 30β60 days | Part | β | β | Easy |
| Spinach | Cool | 35β50 days | Part | β | β | Easy |
| Swiss chard | Cool | 50β60 days | Full | β | β | Easy |
| Carrot | Cool | 60β80 days | Full | β | β | Moderate |
| Beet | Cool | 50β70 days | Full | β | β | Easy |
| Radish | Cool | 25β35 days | Part | β | β | Easy |
| Onion | Cool | 90β120 days | Full | β | β | Moderate |
| Garlic | Cool | 240β270 days | Full | β | β | Easy |
| Strawberry | Cool | 90β110 days | Full | β | β | Moderate |
Why each one works
Pea
Cool-season 55β70 daysPeas are ideally suited to Tennessee's short, cool spring: direct-sow in late January (West TN) to early March (East TN) and plants will finish before June humidity sets in. The 55β70-day window fits neatly before daytime highs consistently exceed 75Β°F, which halts pod set. Choose a snap or snow type like 'Sugar Ann' for reliability; plant a second succession in late August for a fall harvest that often outperforms spring.
Full pea growing guide βBroccoli
Cool-season 60β90 daysBroccoli thrives when maturing into cool weather rather than out of it, making fall the better season for Tennessee gardeners β count back 80 days from your first fall frost date and transplant accordingly, typically late July to mid-August. Spring crops require starting transplants indoors in January and setting them out in February to beat the heat. 'Belstar' and 'Diplomat' offer strong heat tolerance for the inevitable warm spells at season's end.
Full broccoli growing guide βCabbage
Cool-season 60β100 daysCabbage tolerates Tennessee's periodic late-winter cold snaps well and can be transplanted out 6β8 weeks before last frost, giving it a long, slow head-forming period in cool soil. Fall plantings are even more reliable: heads forming in October cool weather are dense, sweet, and less prone to splitting than those rushed to finish in May heat. 'Stonehead' and 'Savoy Ace' handle the state's clay-heavy soils and humidity better than heirloom flat types.
Full cabbage growing guide βCauliflower
Cool-season 60β100 daysCauliflower is the most exacting crop on this list in Tennessee because it demands a narrow temperature window β consistently between 45Β°F and 70Β°F β to form a tight, white curd. Fall is far more reliable than spring; transplant in late July for a late-October harvest. Blanching (tying outer leaves over the developing curd) is essential to prevent yellowing during any warm spells, and 'Cheddar' or 'Graffiti' colored varieties are slightly more forgiving than white types.
Full cauliflower growing guide βKale
Cool-season 50β65 daysKale is arguably the lowest-risk cool-season crop in Tennessee: it tolerates frost down to the mid-20sΒ°F, grows quickly at 50β65 days, and actually improves in flavor after frost converts leaf starches to sugars. Direct-sow in late February for spring harvest or in August for a fall crop that persists well into December in Middle and West Tennessee. 'Winterbor' curly kale is more heat-tolerant than 'Lacinato' for the unpredictable warm spells of Tennessee spring.
Full kale growing guide βLettuce
Cool-season 30β60 daysLettuce works best as a cut-and-come-again crop in Tennessee, where direct-sowing every three weeks from late February through April provides continuous harvests before bolting hits in May. Fall is even better: sow from late August through October and harvest into December, with row cover extending the season past first frost. Loose-leaf varieties like 'Black Seeded Simpson' or 'Red Sails' are far more bolt-resistant than heading types when temperatures spike.
Full lettuce growing guide βSpinach
Cool-season 35β50 daysSpinach is the earliest vegetable a Tennessee gardener can put in the ground β it germinates in soil as cold as 35Β°F and can be direct-sown from mid-January onward in most of the state. The challenge is its intolerance of day length: it bolts the moment daylight exceeds about 14 hours in late spring. Sow 'Bloomsdale Long Standing' for maximum bolt resistance, and plan on a fall succession starting in September as the primary crop.
Full spinach growing guide βSwiss chard
Cool-season 50β60 daysSwiss chard bridges Tennessee's seasons better than almost any other leafy green: it tolerates both light frost and brief heat spikes into the low 90sΒ°F, making it useful from early spring through hard freeze. Unlike spinach, it does not bolt on long spring days, so a February planting can produce continuously through June if given afternoon shade in May. 'Bright Lights' is a proven performer statewide; harvest outer leaves to keep plants productive for months.
Full swiss chard growing guide βCarrot
Cool-season 60β80 daysCarrots need Tennessee's loose, rock-free soil profile β heavy clay requires raised beds or a dedicated soil mix to prevent forked, stunted roots. Sow directly 8β10 weeks before last frost for spring, or in late August for a fall crop that can overwinter in the ground with light mulch in most of the state. 'Danvers 126' is the traditional Tennessee standard for clay-heavy conditions; 'Napoli' is shorter-rooted and suits shallower raised beds.
Full carrot growing guide βBeet
Cool-season 50β70 daysBeets offer dual-use value β both roots and greens are edible β and their heat tolerance makes them more forgiving than carrots if spring warms quickly. Direct-sow 6 weeks before last frost and again in mid-August; fall beets develop sweeter roots as temperatures drop and can be left in the ground through early December in Middle Tennessee. Soak seed clusters overnight before planting to improve germination, and thin to 3 inches apart or roots will be stunted.
Full beet growing guide βRadish
Cool-season 25β35 daysRadishes are the fastest return in any Tennessee garden β 'Cherry Belle' can be harvested in 22 days, which means you can sow them between slower crops as a space filler and natural soil loosener. Plant every 10β14 days from late February through April, then again in September through October for a fall run; summer heat makes them bolt and turn pithy within days of germination. Use them as row markers for slow-germinating carrots and parsnips planted in the same bed.
Full radish growing guide βOnion
Cool-season 90β120 daysTennessee's long cool spring suits long-day onion varieties, which require increasing day length to trigger bulbing β transplants or sets set out in late February to March will bulb up through May and June for a July harvest. Choose intermediate to long-day varieties like 'Candy' or 'Texas Early Grano' for Middle and West Tennessee; high-elevation East Tennessee growers can use standard long-day types. Sets are faster and more reliable than seed for first-time growers.
Full onion growing guide βGarlic
Cool-season 240β270 daysGarlic is planted in October or November in Tennessee β typically after the first frost β and left in the ground all winter to develop a strong root system before shooting up in spring and harvesting in June. This makes it one of the most hands-off crops in the garden: plant, mulch heavily with straw, and largely ignore it until scapes curl in early June. Hardneck types like 'Chesnok Red' or 'German Red' perform well in most of the state; softneck varieties suit the warmer western regions where winters are milder.
Full garlic growing guide βStrawberry
Cool-season 90β110 daysTennessee's Zone 7 climate is ideal for June-bearing strawberries, which are planted in fall (October) or very early spring and produce a concentrated harvest the following MayβJune. The state's long, warm autumns give fall-planted crowns time to establish before dormancy, resulting in far better yields than spring-only planting. 'Chandler' and 'Earliglow' are proven performers across Middle and West Tennessee; 'Allstar' handles the heavier clay soils and humidity of the eastern parts of the state.
Full strawberry growing guide βFrequently asked questions
When is the last frost date in Tennessee, and how does it vary across the state?
Last frost dates range from around March 15 in Memphis and the western lowlands to April 15 in higher-elevation areas of East Tennessee and the Appalachian foothills. Middle Tennessee (Nashville area) typically sees its last frost around April 5. Always check your specific county extension office data rather than relying on state-wide averages, since local topography creates significant microclimates.
Is fall or spring the better season for cool-season vegetables in Tennessee?
Fall is generally more reliable for most cool-season crops in Tennessee. Spring planting is a race against summer heat that can end abruptly in late April or May, whereas fall offers a longer, more gradual cool-down from August through November with fewer sudden temperature spikes. Crops like broccoli, cauliflower, and lettuce form better heads and are less prone to bolting when maturing into cooler temperatures rather than out of them.
How do I deal with Tennessee's clay soil when growing root vegetables like carrots and beets?
Raised beds filled with a mix of topsoil, compost, and coarse sand are the most practical solution for clay-heavy Tennessee soils. For in-ground planting, work in 3β4 inches of compost to a depth of 12 inches and choose shorter varieties like 'Danvers Half Long' carrots or cylindrical beet types that don't need to penetrate as deep. Avoid tilling wet clay soil, which compacts it further and creates hardpan layers that deflect roots.
Can I extend the cool-season growing window past the first fall frost?
Yes β row cover fabric (spunbond poly, sold as Reemay or Agribon) can extend the season 4β6 weeks past first frost for most crops on this list. Kale, spinach, Swiss chard, carrots, and beets are especially frost-tolerant and will survive well into December under a single layer of row cover in Middle and West Tennessee. Garlic and overwintered onion sets need no protection at all in most of the state.